Abstract
In this work, the effects of high-content (30 at.%) solvent element (denoted as HC30SE) substitution of Cr for Fe on crystallization kinetics between Cr45Fe11Co7Mo14C15B6Y2 metallic glass (MG) and the precursor Fe41Cr15Co7Mo14C15B6Y2 MG were studied by Johnson-Mehl-Avrami, Arrhenius, Kissinger and Ozawa approaches using differential scanning calorimeter. Under the isothermal crystallization, the incubation period, local activation energy and the diversity of the crystallized phase are improved by HC30SE substitution of Cr for Fe. Additionally, the crystallization characteristics established by Avrami exponent change from a combination of growth with retarding nucleation rate and growth with promoting nucleation rate to only a growth with promoting nucleation rate after HC30SE substitution of Cr for Fe. Moreover, the local Avrami exponent for the two MGs possesses nearly opposite trend with each other. Furthermore, the difficulty of the non-isothermal crystallization events is enhanced after HC30SE substitution of Cr for Fe as the enhanced apparent activation energy.
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